New Q about heat exchangers (nothing in search)

[Voice of Reason]

My question has to do with the need for fans. At what speed of the car will the fans become no longer useful? IE: If the car is moving at xx miles an hour the same amount of air is being pushed through the HE as when the car is at idle and the HE fans are turned on. I'm basically trying to figure out if the fans are necessary. Thanks.

 

[maoun]

the fans are very important for when you're idling, mostly

 

[bassin247]

Originally posted by maoun
the fans are very important for when you're idling, mostly

I don't know about very important, but they are the most beneficial when your car is not moving.

 

[BADASS03SVT]

when talking rediators, ive always heard anything over 45-50mph u wouldnt need a fan. i think the fans would benefit for all low speed cooling..50mph and under. at least when u get on it and over 50 its been cooled right?

 

[Friendchicken]

I would say 35 miles an hour or less... just ask the flies that hit my bumper whether they are being "sucked in" or "pushed into" my heat exchanger

 

[bassin247]

When your fan is on, it blows the air to the front of the car. When the car is moving the air is being forced to the back of the car.

If you car is moving with the fans on your are pushing air against air. You also restict the flow across the HE by mounting the fans to it.

The only real way to determine the effectiveness would be to datalog the temp before and after the HE with the fans on and off in different temperatures.

I'm willing to bet there are minimal gains.

 

[Voice of Reason]

Originally posted by bassin247
When your fan is on, it blows the air to the front of the car. When the car is moving the air is being forced to the back of the car.

If you car is moving with the fans on your are pushing air against air. You also restict the flow across the HE by mounting the fans to it.

The only real way to determine the effectiveness would be to datalog the temp before and after the HE with the fans on and off in different temperatures.

I'm willing to bet there are minimal gains.

What? Even with the fans mounted on the backside of the HE they should be setup to pull air, not push it. Basically, they should be setup the same way that the fan on our radiator is. I've never heard of a fan that would push air out. Heck, if that was the case any movement of the car at all would negate the effects of the fan. I don't think this is correct.

 

[BADASS03SVT]

Originally posted by bassin247
When your fan is on, it blows the air to the front of the car. When the car is moving the air is being forced to the back of the car.

If you car is moving with the fans on your are pushing air against air. You also restict the flow across the HE by mounting the fans to it.

The only real way to determine the effectiveness would be to datalog the temp before and after the HE with the fans on and off in different temperatures.

I'm willing to bet there are minimal gains.

what? go back to bed...